Best Scala Interview Questions and Answer Preparation Resources

Scala provides functional programming support and strong static type system, which makes it a huge general purpose programming language. Scala is a portmanteau of 'scalable' and ‘language’. It is designed to grow with user demand. It is a functional and hybrid object-oriented programming language, with emphasis on functional programming preferences like laziness and immutability. Scala evolved to the general public in 2004. The Scala programming language has some common features with the Kotlin like higher-order functions, conciseness of code, FP functionality with an OOP style, and interoperability with Java programming language.

Frequently Asked Questions on Scala interview questions

According to many websites, Scala is better than Java because Scala is a mixture of both object oriented and functional programming but Java is a general purpose object oriented language.Scala is less readable due to nested code but Java is more readable.Scala support operator overloading but Java does not support operator overloading.In Scala, the code is written in compact form but In Java, the code is written in long form.In Scala, all the operations on entities are done by using method calls but In Java, and operators are treated differently and are not done with method call.

A trait that encapsulates method and field definitions, which can then be reused again and again by mixing them into classes.In scala, trait is a logical collection of abstract and non-abstract methods or functions. Traits are compiled and built into Java interfaces with corresponding implementation classes that hold or contain any methods implemented in the traits. Scala Traits consists of method and field definitions that can be reused by mixing classes. The class can mix any number of traits. Scala traits are interesting because they can be used for inclusion polymorphism and to mixin behaviour.

Scala Macros are functions or methods that are called by the compiler during compilation. Scala Macros are shipping with the official Scala compiler. Macros are good for code generation, static checks and domain-specific languages, which makes them a tool of choice for a multitude of real-world use cases. Macros in scala facilitatesus to modify existing, generate new code before it gets compiled. They are used under the banner of many known libraries in scala ecosystem framework like shapeless, slick or play framework. They come in different flavors and version, one among them are: def macro and macro annotations.